Closure cap and container

Abstract

A closure for a container characterized by a crown and a depending skirt, retaining means provided on the skirt adapted to cooperate with corresponding means on a container to retain the closure about a neck of the container defining a dispensing opening thereof, a flexible annular sealing ring extending from an internal surface of the closure adapted to engage in sealing relationship with the container neck, a sealing ring support adapted to assist said ring into sealing engagement with the container and means for permitting pressure of the container contents to act upon the sealing ring to urge the ring into sealing engagement with the neck of the container to which the closure is applied.

What we claim is: 
     
       1. A closure cap in combination with a container which has a neck provided with a dispensing opening, said cap comprising a crown and an annular skirt depending from the crown, means on the skirt securing the cap to the container neck with the crown disposed across said opening,   a flexible annular sealing ring integral with the cap and inclined inwardly towards the axis of the cap, said ring having an annular extremity in sealing contact with the top of said container around said opening, and   a segmented support ring disposed on the crown within the space between the sealing ring and the inner surface of the crown whereby the sealing ring is pressed thereagainst when the sealing ring engages the container, said segmented ring permitting fluid under pressure to escape from the container into the space between the sealing ring and the crown where it is confined and urges the sealing ring against the container.   
     
     
       2. The combination of claim 1 further characterized by an annular resilient sealing surface on the internal surface of the skirt juxtaposed to the sealing ring, which sealing surface is adapted to be an interference fit with the neck of the container in order to effect a seal between said cap and the container neck. 
     
     
       3. The combination of claim 2 characterized in that the sealing surface is provided on the internal surface of the skirt and gradually decreases in diameter across the skirt in a direction towards the crown of the cap. 
     
     
       4. The combination of claim 3 characterized in that the decrease in diameter is progressive so that the sealing surface passes about the corner defined by the junction of the sealing ring and the skirt in a smooth configuration to extend inwardly of the cylindrical surface of the skirt. 
     
     
       5. The combination of claim 1 further characterized in that the outer extremity of the sealing ring has an enlarged annular member adapted to engage and seal with the neck of the container, said sealing member having a sealing surface which carries at least one rib adapted to make line contact with the neck of the container abutting said sealing surface to effect a seal therebetween. 
     
     
       6. The combination of claim 1 further comprising an opening in said support ring for permitting the pressure of the contents to act upon the sealing ring, said opening in said support ring comprising an interruption of the support ring to permit pressure to enter behind the sealing ring and support ring to urge, said sealing ring into sealing engagement with the container neck.